品質管理與實習 : MIL-STD-105E 何正斌 國立屏東科技大學工業管理學系.

Presentation on theme: "品質管理與實習 : MIL-STD-105E 何正斌 國立屏東科技大學工業管理學系."— Presentation transcript:

A lot size N is submitted for inspection A single sampling plan is defined by The sample size n The acceptance number c Inspect a random sample of size n from a lot-(N) d=# of observed defectives Reject the lot d>c Accept the lot d≦c d>c

n1=sample size of the first sample c1 and c2=acceptance number of the first sample n2=sample size of the second sample c3=acceptance number both samples inspect a random sample of n1 from the lot d1=number of defectives accept d1≦c1 d1>c2 reject c1<d1<=c2 inspect a random sample of n2 from the lot d2=number of defectives accept d1+d2 ≦ c3 d1+d2>c3 reject

MIL-STD-105E使用程序

Examples Ex1 Ex2-減量 or 加嚴 Ex3 查Code Letter N=5000+檢驗水準II ，則得L

OC Curve-Operating Characteristic Curve
Ideal OC curve - p269 fig. 9.1 當執行全檢時才會有ideal oc curve Typical OC curve – p268 fig.9.2 p, N, n, C Assumption? Hypergeometric. Binomial, or Poisson Distributions 計算允收機率，即可繪圖 Example

OC-curve 生產者風險(producer’s risk) 消費者風險(consumer’s risk) 生產者生產出好產品但被拒收

The End

=6,and 7 →Accepted and to Normal